Printing apparatus

Abstract

To provide a printing apparatus capable of maintaining ejection performance without increasing the size of a recovery unit. The printing apparatus includes: a cap capable of covering an ejection port surface having an ejection port formed therein to eject a liquid; a cap holding portion that movably holds the cap between a position where the cap contacts the ejection port surface and a position where the cap does not contact the ejection port surface; a suction unit capable of sucking the liquid from the cap; a collection unit for collecting the liquid sucked by the suction unit; a first channel connecting the cap and the suction unit; and a second channel connecting the suction unit and the collection unit. In top view, a part of the first channel and a part of the second channel are disposed at positions overlapping with the cap holding portion.

What is claimed is: 
     
         1 . A printing apparatus comprising:
 a cap configured to cover an ejection port surface having an ejection port formed therein to eject a liquid;   a cap holding portion configured to movably hold the cap between a position where the cap contacts the ejection port surface and a position where the cap does not contact the ejection port surface;   a suction unit configured to suck the liquid from the cap;   a collection unit configured to collect the liquid sucked by the suction unit;   a first channel connecting the cap and the suction unit;   a second channel connecting the suction unit and the collection unit; and   a channel holding portion configured to hold a part of the first channel and a part of the second channel, wherein   in top view, a part of the first channel and a part of the second channel are disposed at positions overlapping with the cap holding portion.   
     
     
         2 . The printing apparatus according to  claim 1 , wherein
 the channel holding portion includes an upper plate and a lower plate arranged in a vertical direction, and   a part of the first channel and a part of the second channel are fixed by being sandwiched between the upper plate and the lower plate.   
     
     
         3 . The printing apparatus according to  claim 2 , wherein
 the upper plate has a tray part configured to receive a liquid dripping from the cap, and   in top view, the tray part is disposed at a position overlapping with the cap.   
     
     
         4 . The printing apparatus according to  claim 1 , wherein
 the cap holding portion and the suction unit are arranged in positions lined up along a first direction,   the first channel extends along the first direction, and   the second channel includes a portion disposed in parallel with the first channel along the first direction from the suction unit, and a portion separated from the channel holding portion and connected to the collection unit.   
     
     
         5 . The printing apparatus according to  claim 4 , wherein
 a part of the first channel and a part of the second channel extend along the first direction in a horizontal plane, and are arranged along a second direction intersecting with the first direction.   
     
     
         6 . The printing apparatus according to  claim 4 , wherein
 the collection unit, the cap holding portion, and the suction unit are arranged in this order along the first direction.   
     
     
         7 . The printing apparatus according to  claim 5 , wherein
 the first channel and the second channel are arranged within the range of the channel holding portion in the second direction.   
     
     
         8 . The printing apparatus according to  claim 1 , further comprising:
 a cam configured to perform a rotation operation; and   an arm having an end portion configured to slide against the cam and fixed to the cap holding portion, wherein   by rotating the cam in one direction, the rotation operation is converted into an elevating and lowering operation of the cap holding portion, and   the ejection port surface is covered as the cap holding portion is elevated, and the cap is separated from the ejection port surface as the cap holding portion is lowered.   
     
     
         9 . The printing apparatus according to  claim 1 , wherein
 the cap includes a first cap for containing black ink and a second cap for containing color ink,   the first channel includes a first tube connecting the first cap and the suction unit, and a second tube connecting the second cap and the suction unit, and   the second channel includes a third tube and a fourth tube connecting the suction unit and the collection unit.   
     
     
         10 . The printing apparatus according to  claim 1 , wherein
 the first channel includes a space to temporarily store the liquid.   
     
     
         11 . The printing apparatus according to  claim 1 , further comprising:
 a printing head having the ejection port surface.   
     
     
         12 . The printing apparatus according to  claim 5 , further comprising:
 a conveyance unit configured to convey a printing medium along the first direction; and   a carriage mounted with a printing head having the ejection port surface and configured to reciprocate along the second direction.   
     
     
         13 . The printing apparatus according to  claim 12 , wherein
 the printing head has a storage portion to store a liquid, and is detachable from the carriage.